Device for operating furnace-doors, gates, &amp;c.



No. 803,597. PATENTED NOV. 7, 1905.

J. S. HOOD. DEVICE FOR OPERATING FURNACE DOORS, GATES, &0.

APPLICATION FILED MAR-.16, 1905.

Z SHEETS-SHEET 1 l l *i ll 39 Jdiqv/iwad, Witnesse Inventor.

by I I Attorneys PATENTED NOV. 7, 1905.

J. S. HOOD. DEVICE FOR OPERATING FURNACE DOORS, GATES, &0.

APPLICATION FILED MAR. 16, 1005.

2 SHEETSSHEET 2.

inventor;

Witnesses Attorn eys hereinafter fully described, and

UNITED STATES PATENT o FIoE.

DEVICE FOR OPERATING FURNACE-DOORS, GATES, 800.

Specification of Letters Patent.

Patented Nov. 7, 1905.

Application filed March 16, 1905. Serial No. 250,496.

To all whom it may concern:

Be it known that I, JOSEPH S. HOOD, a citizen of the United States,residing at Stahlstown, in the county of Westrnoreland and State ofPennsylvania, have invented a new and useful Device for OperatingFurnace-Doors,

Gates, &c, of which the following is a specification.

This invention relates to devices for operating furnace-doors, gates,and the like; and the objects of the invention are to simplify andimprove the construction and operation of this class of devices.

With these and other ends in view, which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of parts,which will be particularly pointed out in the claims. I

In the accompanying drawings has been illustrated a simple and preferredform of embodiment of the invention, it being, however, understood thatno limitation is necessarily made to the precise structural detailstherein exhibited, but that the right is reserved to any changes,alterations, and modifications to which recourse may be had within thescope of the invention and without departing from the spirit orsacrificing the efficiency of the same.

In said drawings, Figure 1 is a longitudinal vertical sectional viewillustrating the inven tion as applied to a furnace-door. Fig. 2 is abottom plan view of the same. Fig. 3 is a perspective detail viewshowing in inverted position and disassembled the link members fortransmitting motion between the main operating-rod and the hinge-postlever. Fig. 4 is a perspective detail view of the hinge-post lever. Fig.5 is a diagrammatic plan view illustrating the invention as applied tothe operation of a railroad-gate.

Corresponding parts in the several figures are indicated throughout bysimilar characters of reference.

In the figures of the drawings where the invention has been shownapplied to a furnacedoor, 1 designates the front wall of the furnace,and 2 the floor in front of said furnace.

3 is the furnace-door, and 4: the hinge-post supporting said door, saidhinge-post being extended through the floor and beneaththe latter. Uponsaid hinge post is securely mounted a lever 5, having a V-shaped openingor cam-slot 6.

In brackets or bearings 7 beneath the floor 2 is supported a rock-shaft8, which is disposed transversely to and a suitable distance in front ofthe furnace. Said rockshaft is provided with two upwardly-extendingtriparms 9 and 10 and with a downwardly-extending arm 11, which latter,if desired, may be integral with the trip-arm 10, as shown, the arms 9and 10 being disposed at an angle to each other, as clearly seen in Fig.1, and spaced apart from each other, as clearly seen in Fig. 2. Thefloor 2 is provided with openings 12 13, in which are hingedly mountedtreadles 14 15, which are normally supported upon the trip-arms 9 and10, respectively.

Upon studs 16 17, depending from the floor 2, are fulcrumed a pair oflevers 18 19, provided at their inner ends, respectively, with a notchor recess 20 and with a lug 21. A third lever or link 22 is fulcrumedupon a stud 23, depending from the floor 2 between the studs 16 17, andsaid link or lever is provided at the ends thereof with a lug 24 and anotch or recess 25, engaging, respectively, the notch 20 of the lever 18and the lug 21 of the lever 19. The intermediate link 22 thus serves totransmit motion between the levers 18 and 19. Said levers are providednear their outer ends with lugs 26 and 27, the lug 26 of the lever 18being in engagement with the camslot 6 in the hinge-post lever 5 and thelug 27 of the lever 19 engaging a slot 28 in one end of a connecting-rod29, the opposite end of which is pivotally connected with the arm 11 ofthe rock-shaft 8.

It will be seen that under the construction described when thefurnace-door is closed the rock-shaft 8 will occupy 'a position in whichone of its armsin the present instance the arm 10supports one of thetreadles-in this case the treadle 15in such a position that the free endof said treadle will be elevated slightly above the floor 2, while thetreadle 14, supported upon the arm 9, is practically flush with thefloor. The extremities of the arms 9 audit) are beveled so as toslidingly engage the under sides of-the treadles. The operator bystepping upon the elevated treadle 15 will cause the rock-shaft tooscillate in its bearings, causing the arm 9 to elevate the treadle 14:,while the arm 11, through the connecting-rod29, rocks upon its fulcrumthe lever 19, from which a similar rocking motion is imparted throughthe link 22 to the lever 18, the lug 26 of which engaging the cam-groovein the lever 5 serves to swing the latter and the hinge-post 4, thusopening the door 3. By stepping upon the treadle 14 the operation willbe reversed and the door will swing shut.

It is obvious that with such slight modifications as will involve merelymechanical skill the present invention may be applied to the operationof doors, gates, and swinging structures of all descriptions. In Fig. 5of the drawings the invention has been shown applied to a gate 30 at arailroad-crossing 31. Under this modification the treadles 14: and 15will be actuated by engaging means connected with the locomotives ofpassing trains, and it will become necessary to provide an extension 29of the connecting-rod 29, the said extension having connection with thearm of a rook-shaft 8*, actuated by an auxiliary set of treadles 14 and15, to be operated by engaging members connected with trains passing inan opposite direction. Of this modification merely a diagram has beenshown, the general construction and operation being readily understoodby any skilled mechanic.

From the foregoing description, taken in connection with the drawingshereto annexed, the operation and advantages of this invention will bereadily understood by those skilled in the art to which it appertains.The construction is simple and inexpensive, and the device will be foundto be thoroughly efiicient in the practical application thereof.

As will be best seen in Fig. 2 of the drawings, the treadles 14: and 15are to be supportedhingedly upon opposite sides of the rock-shaft 8, thearms 9 and 10 of which are beveled in opposite directions, thusfacilitating the practical operation of the device.

Having thus described the invention, what is claimed is- 1. In a deviceof the class described, ahingepost having a lever provided with acam-slot, a rock shaft having upwardly extending treadle-supporting armsand a downwardlydownwardly-extending arm of the rock-shaft.

2. In adevice of the class described, a rockshaft, oppositely-beveledupwardly-extending arms connected with said rock-shaft at an angle toeach other, treadles supported hingedly at opposite sides of therock-shaft and having their free ends supported upon the beveled arms, ahinge-post carrying a door or gate, and means for transmitting motionfrom the rock-shaft to said hinge-post.

3. Inadevice of the class described, a rockshaft, oppositely-beveledupwardly-extending arms connected with said rock-shaft at an .angle toeach other, treadles supported hingedly at opposite sides oftherock-shaft and having their free ends supported upon the beveledarms, a hinge-post carrying a door or gate, a lever upon said hinge-posthaving a cam-slot formed therein, and means for transmitting motion tosaid lever from the rock-shaft; said means including a connecting-rodhaving one end connected with an arm extending downwardly from therock-shaft and provided with a slot at the other end, a pair ofsuitably-supported levers having lugs engaging the slots in theconnecting-rod and in the hinge-post lever, respectively, and anintermediate link operatively engaging and connecting said levers.

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in the presence of two witnesses.

JOSEPH S. HOOD.

Witnesses:

J. E. BEIsTEL, P. A. IVIOELHOE.

